Extension device for bracelets



Nov. 4, 1930. A, F KRAEMEQ` 1,780,824

EXTENSION DEVICE FOR BRACELETS Filed Jly l2, 1929 INVENToR.

A TTORNE YS.

Patented" Nov. 4, 1930 AUGUST r. KRAEMER, VoirY rnovIDENoE, niioinlfii.vIslIin'1\rI r Assiflvon trolpoursfsrnxnn': u COMPANY, or rnovinnncnnnonn vIsLANn,.n.Yconnogaatrioivor; monn'snnnin" r EXTENSION, DEVICE. non 'jinncnrinrsf Y' Appli-cation inea Juiyia, 1929.1 serial no. 377,739,

This invention relates tof improvements in an extension device for bracelets, more par-l ticularly for watchbracelets; and the object of Athis invention is lto provide a .plurality of sections hinged together to be unfolded to anjend-toend extended position to temporarily lengthen the braceletsto bepressed over the hand of thelwearer and to fold thesesections to nest one within the other; also to provide means at both ends of these folded sections for releasably securing them together. l A further objectr of theinvention is to'provide a pivot pin receiving loop on the adjacent end of each of the end members, which loops are arranged to'engage one with the other to lock these/ends together and to also provide cooperating detent members at the opposite ends of said membersl to also releasably lock these members of the device together. n

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. l is a top view showing my improved extension device in folded position and attached at each end of links of the bracelet.

Fig. 2 is a view of the under side of the extension device and attached to links of the bracelet. Y

Fig. 3 is a view of the under side of the extension device, showing the membersy of the device as swung to extended position.

Fig. 4 is a view of the fold of the device, showing the members in extended position.

Fig. 5 shows the members of the .extension device in folded position vand illustrating the loop of one of the end Vmember as engaging-that of the other end 'member to lock this .end of these two members together.

Fig. 6 is an enlarged view of the loop ends i as illustrated in Fig. 5, showing the center of the inner loop as snapping inwardly past the center of the outer loop.y

Fig. 7 shows these foldable members as being in released position and partly folded.

\ Fig. 8 shows'the. three extensionmemliers? as separated one=fromthe;other.g-E Taf/gaf Itis found. 'npractice ofadvantage tolo'ck both ends ofthe folded parts of an eXtensioL deviceso that an endwise -pullon the *bracesl 5m let will not serve to`openupgthis; .eXtensi'i1-if device, and to accomplishthislockino'eect: @a both @meer the, aevieai yhave foiedvthe. Y

end portion ofthe top wall of one of these?` members into a. pivot pin receivingloop,.and 5m have folded the bottomfwall ofthe adjacentend of the other; member alsoginto a pivot; pin vreceiving loop-and have arranged these.Vv loops so that one is smaller than the other; and will snap `by andilock or-.releasably'retain 55;

"these endsA of the device in .nested position.

Also,` I have provideda-cooper'ating snap-l ping detent for .the oppositel end. ofVV thesef members whereby whencnested,*both Vends', Aof

these folding membersareretained infolded 1o;

position.` Andther'foljlowing isa-detailed.: description ofV the `present embodiment? of` my invention and. showing `one means; by fwhich these.. advantageousfresultsi lmay be accomplishedz f V f With reference to the drawings', .-10 .-desig. nates themain channel section of theextension member, which `is provided with two-side. walls ,l1,and. `a.to1. wallA 12.; One end ofthisVV top wall as ybest; illustratedl 'in Fig. 6, is eX- son tended and folded intoa loop,;as at 13, hav-y ing aneye llythroughwhich the pivot pin. 15 extends. This endmwall is notched. inwardlyrat .16,.to `receiveatop plate of the next adiacenti link` :ofthe gbracelen. IW. have" 855 also i provided l ai second channel* section '17,

' which is substantially the'lengthl of the main channel section and of a-'widtht'o nest -`within that section. This second` channel 'section Y is -v provided with aV bottom vWan-1 is, which is@ 905 foldedV atV its end into loop shap e'. as' at :19,'forg the reception of itsipivotfpin 20, 'by' is pivotally connectedzthrfough the intermedi``- A Y.

Center. Qfth 11.091. 13 sfethetfthisntl Set/tien. 1w;

Shall be retainedwhen folded'nto nested p0- -v l sition.

Cooperating with this pair of detent loops Y for one end offtherextending device, I have Aof these folding members, one form of which provided a detent device for the opposite end is herein` shown as being a U-sha ed mem-v ber 22, which vis secured to the un er side ofv the top wall 12 of the main channel section and Ihavefalrlsoprovideda vstud member l23,' which is se'curedto the'jinner face of the bottom wall Y18, ofthe second channel'sectiom. Thisstud t memberis provided with ahead portion 24,

fis

v,which snaps over-the "edgefof the U-,shaped-g Vmember 22,k to performY two functions zFirst, it releasablyretainslthis end ofv thefoldedorv nested members ytogether-g"land secondly, itfVK presses-y the "loop-shaped memberl 20 against the vloop-shapedy member- 15, thereby 'cooper v tension members mso:

, tion.

TheY foregoimg description is vdirected 'solelyt'owards thefconstructi'on illustrated, vbut I loop to permitthe lower member loop ijsdefi members, the uppermember having aflocl:

loop dependin from the free end thereof, the lower mem er having a lock loop extending upwardly from the, end thereof which is adj acenty the said free end when in folded position, the loop of said upper memberbeing of larger diameter than the loop of Ysaid lower member to permit the smaller loop to snap past the center of the largerfloop, and means Y for `d etaehably securing the otherendsof'said members in zuljacenoy.v f f' 4...,In. a bracelet, anV extension'` device com-f prising a 'plurality of hingedly connected members,- theupper member having a lock loop depending from the freel end thereof,l the lower :member havin gl a` lock-loop extend- .ing upwardly ,from theend-*thereof-'which 'is adjacent the :Saidgfree endjwhen; in ,folded v 'y positiomsaid upper member loop being'larger` j A than the' lower member loopf 'and havingfiftsf centerpositioned below the lower member loop at a-distanceffromV the upper member` greater thany the radius of saidrlower member" to snap past thecenter of theupper mem er loop,

`and means for1 detachablyfsecuringthe other ends of said members in adjacency. In testimony whereof I aiix :my signature.

Y AUGUST F.

desire it to be understood'that I res'erverthe'L 'b privilege tofresortingto all the mechanical Y changes toflwhich the device VVisl susceptible,l

the invention being dened'and limited f only by thetermsgofgthe appended claims. f

-I,"c1aim`:i

prisin'g'y a; i]g lu1-'ality l ofA hinged'ly` connected members,v therupper member having: a lock loop depending from the free endl thereof, the lower member having 'Aa-lock loop Yextending y,upwardly Ifrom 'tiheendvthereof which is ad#v jacent fhei'said' freeenemm inefeided pa sition, the .loop ofsaid`upper member being o ffl'arger diameter'thany the loop ofrsaid,v 'u

lowermember to 'permit 'the smaller loop to. i

vsnap past the center ofthe larger loop.v

In abracelet, anextension devicecom-- prlsing ariplurali'tyfof Ahingedly connected loop depending fromfthefree vendgtlereof,

thel lower member ,having a lock loop extendV ing upwardly from the end thereofwhich is adjacent the;v said free end lwhenrin folded*` position, rsaidry upper;l member loop 'being .alr'ger than v,the lower'member loopandlhav-v ing its center positionedv *below the lower member loop fat ald'is'tance from the upper,

member greater-than :theradi'us ofsaid lower member vloop to permit the ylower member 'loop'tov snap past theircenterv of the' upper;

member loop;

prising a pluralityfofV 'hingedly' connected vmembers,-.theupper membery-ha'vifng. alock' l 

